Method of preparing a mineral oil solution of derris



Patented Oct. 26,1937 l UNITED STATES PATENT OFFICE IMETHOD OF PREPARING A MINERAL 01L SOLUTION F DERRIS Nicholas A. Sankowsky, Scotch Plains, N. J., as-

signor to Stanco Inc.

No Drawing. Application October "I, 1933,

- Serial No. 692,708

5 Claims. (CI. 87-28) This invention relates to the preparation of The following exampleswill illustrate the procsolutions of difficultly soluble solids, particularly ess: of solids which are composed of various ingredi- A plant such as Derris, tuba, cube, haiari, etc. ents that have difierent degrees oi solubility. is extracted with a suitable solvent such as ethyl- 5 Where a desired solvent is used in dissolving e'ne dichloride or chloroform by a. countercurrent 5 organic solids composed of various ingredients, method, producing a concentrate of about 20 of which some are more soluble than others, grams of the extractives in 100 cc. of the solvent. dilficulty is found in dissolving the more soluble This concentrated solution is filtered through ingredients due to the presence of the less soluble freshly burnt fullers earth which removes iningredients. gredients that are not soluble in mineral oil 10 It has been discovered that by using another and leaves the mineral oil soluble extractives in solvent in which both the desired solvent and the solution. This filtering through the fullers earth various ingredients are readily soluble, in dissolvalso removes other ingredients which are soluble ing the solid and-then subjecting the solution to in mineral oil, though of no known effect. The

a treatment suchas will be described below to refiltrate may then be added to the mineral oil, 15 move some of the ingredients, a clear solution of such as kerosene, white oil, etc. to prepare the m e l e in r i n d which, either solution of desirable concentration. If desired, p r ted from the olven or to ether with the the filtrate may be subjected to heat to remove solvent, will readily go .into solution in the dethe solvent and the residue dissolved in the min- 29 sired solvent. eral oil.

This process is especially applicable in obtain- In another example, a benzol solution of Derris ing mineral oil extracts of plants of the genera was thoroughly shaken with freshly burnt fullers Deguelia, Lonchocarpus and Tephrosia, such as earth and the clay separated by centrifuging, Derris, tuba, cube, haiari etc. These extracts yielding a benzol solution of mineral oil soluble have insecticidalproperties. The extractives of extractives. 25

these plants are generally obtained by means of This method is applicable, in general, to plant leaching with organic solvents such as benzol, extracts in organic solvents which do not conethylene dichloride, chloroform, etc. The soltain water in an amount sufficient to impair the vent is then evaporated and the resulting exaction of the clay.

tractives dissolved in a mineral oil. The solu- The treating process can be modified in various '30 bility' of the extractives in the petroleum distilother ways without departing from the spirit of late is very low and very low concentrations of t ve i as Sp c fi in e following claims. the extractives are thereby obtained due to the 7 I claim! residue being a'plastic, gummy composition with 1. The pr ss of p par n a mineral oil s lua major part of the mineral oil soluble extraetion of the extractives of plantsof the genera 35 tives covered with a coating of the mineral oil Deguelia. LOIwhOCMDI-IS and p which insoluble extractives. comprises extracting said plants with a volatile An object of the invention is to treat the exr n q i selected fr h group sis n tractives of plants of the genera. De uelia, LQnof benzol, ethylene dichloride and chloroform, and

40 choearpus and Tephrosia, h a Derris, cube, capable of dissolving out ingredients which are 4}) haiari, etc. so that a. more concentrated solution soluble in the mineral Oil to be P e some of the active principles of these plants in mineral i F i msPluble m Sam mlnerajl sald on may be obtained game liquid being also soluble in said nuneral oil,

It has been discovered that by treating a solucontsctingl the gesulting ig): ivithtran ad- '4 sorp ive c ay an separating sa c ay, en n- 0 ggg g fi giggggf g g g gg g izg g corporating the extractive in the mineral oil. I 2. The process of preparing a mineral oil solu- Dems' cube with freshly tion of Derris which comprises extracting the funer's earth other absorptive or adsorptive soluble ingredients of Derris with ethylene di-- claythe ingredlents not $1ub1e in mineral oil are chloride, .contacting the ethylene dichloride soluremoved and the ingredients soluble in mineral tion with fr hly burnt fuller earth, eparating oil remain in solution. The solution may then be th fullers earth, dissolving the ethylene 11 1 1 dissolved in mineral oil or the solvent evaporated ride solution in a, mineral oil and evaporating the and the residue dissolved in a mineral oil to yield ethylene dichloride.

a concentrated solution. 3. The process of preparing a mineral oil solu- 55 tion of Derris which comprises extracting the soluble ingredients of Derris with ethylene dichloride, contacting the ethylene dichloride solution with freshly burnt fullers earth, separating the iullers earth, evaporating the ethylene dichloride and dissolving the residue in a mineral oil.

4. The process of preparing a. mineral oil solution of Derris which comprises extracting the soluble ingredients of Derris with chloroform, contacting the chloroform solution with freshly burnt fullers earth, separating the fullers earth,

dissolving the chloroform solution in a mineral oil and evaporating the chloroform.

5. The process of preparing a mineral oil solution of Derris which comprises extracting the soluble ingredients of Derris with benzol, contacting the benzol solution with freshly burnt fullers earth, separating the fullers earth, dissolving the benzol solution in a mineral oil and evaporating the benzol.

NICHOLAS A. SANKOWSKY. 

